Track, understand and improve performance metrics
Turn on. Receive metrics instantly.
Nothing to install, start tracking in minutes
Setup in minutes by typing in a few fields and clicking a couple of buttons.
Automatic Snapshots are taken daily, or post-deploy using the Snapshot API.
Google Lighthouse built-in
Get continuous Progressive Web Application audits with Google’s cutting edge performance suite. Follow up on best practice and accessibility guidelines.
Automated and distributed monitoring
Test from all corners of the globe and discover where your users are suffering the most.
Real-world device and connection emulation
Mimic the conditions your customers face with Test Profiles. Make direct performance comparisons and act on them.
User-focused metrics
Visually Complete and Time to Interactive help to determine how quickly users can interact with the interface, not when scripts finish loading in the background.
Request and asset analysis
Dive into a detailed view of the assets your sites deliver. Discover the performance footprint of ads, imagery or external scripts with ease.
Performance Budgets
Set budgets against any metric Calibre records—no matter the page, device or connection profile. When a budget is blown (or met), you’ll be the first to hear about it.
Realtime notifications and alerts
Keep an eye on crucial aspects of performance. Get notified through email or Slack instantly.
What our customers are saying
“Calibre is the answer to clients’ performance tooling and testing questions that I used to shrug off with 'well there’s a Grunt task that sorta works.'”
Mat Marquis, Inclusive Web Developer at Bocoup
Try Calibre for free
Nothing to install · 14-day free trial · Cancel anytime · Set up in minutes.